Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1988-08-17
1990-02-06
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
G01R 3320
Patent
active
048991082
ABSTRACT:
A high frequency coil is constructed by combining a plurality of unit coil having two saddle shaped coils which are vertically symmetric to each other. Each unit coil is disposed so as to locate the line sections of each saddle shaped coil on an outer peripheral surface of an elliptic cylinder. Assuming the plane perpendicular to the central axis of the elliptic cylinder is an x-y plane, major axis of an ellipse on the x-y plane as x axis and minor axis thereof as y axis, the angle between the x axis and the line extending from origin to the line section located in a first quadrant chosen among the line sections of each unit coil is assumed as .theta.. The optimum angle .theta..sub.op is determined in such a way that when power series expansion relative to y over the magnetic flux density distribution on the y axis of the magnetic flux generated by the high frequency coil is performed, the angle at which the coefficient of the terms with up to degrees of 2N or 2N-2, N is a number of the unit coil, become zero. It is possible to obtain a high frequency magnetic field having exactly uniform magnetic flux density by means of directing .theta. to .theta..sub.op or near by .theta..sub.op.
REFERENCES:
patent: 4613837 (1986-09-01), Blass et al.
patent: 4712067 (1987-12-01), Roschmann et al.
patent: 4752738 (1988-06-01), Patrick et al.
patent: 4766383 (1988-08-01), Fox et al.
Fujita Michiru
Higuchi Masao
Arana Louis M.
Fuji Electric & Co., Ltd.
Tokar Michael J.
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